Automatic cooking apparatus.



R. M. G. PHILLIPS.

AUTOMATIC COOKING APPARATUS.

APPLICATION FILED NOV-1. I9I4.

Patented Nov. 23, 1915.

4 SHEETS-SHEET I- R. M. G/PHILLIPS.

AUTOMATIC COOKING APPARATUS.

APPLICATION FlLED NOV-7,1914. Llfilbfi. Patented Nov. 23, 1915.

4 SHEETS-SHEET 2.

COLUMBIA PLANDGRAPH co., WASHINGTON, n. c.

R. M. G. PHILLIPS.

AUTOMATIC COOKING APPARATUS.

APPLICATION FILED NOV. 7. 1914.

Patented Nov. 23, 1915.

4 SHEETS-SHEET 3.

COLUMBIA PLANOGRAPH 60., WASHINGTON u c R! M. a. PHILLIPS.

AUTOMATIC COOKING APPARATUS.

APPLICATION FILED NUVAY. 1914- Patented Nov. 23, 1915.

4 SHEETSSHET 4.

COLUMBIA PLANOURAPH CU.,WASHINGTON, D. c.

ROSS M. Gr. PHILLIPS, OF WEST HAVEN, CONNECTICUT.

AUTOMATIC COOKING APPARATUS.-

Application filed November 7, 1914.

To all whom, it may concern Be it known that 1, Ross M. G. PHILLIPS, a citizen of the United States, residing at Vest Haven, in the county of New Haven and State of Connecticut, have invented a new and useful lmprovement in Automatic Cooking Apparatus; and 1 do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same and which said drawings constitute part of this application, and represent,

Figure 1 a view in front elevation of one form which an automatic cooking. apparatus constructed in accordance with myinvention may assume. Fig. 2 a view thereof in right hand side elevation, with the upper rear corner of the cooking compartment or oven broken away to show the egress draftpassage and its damper or closure. Fig. 8 a view in horizontal section on the line c-cl of Fig. 1. Fig. at a broken detail view through the bottom of the cooking com.- partment to show its ingress draft-passage and the oscillating shutter employed to close the same. Fig. 5 a detail view showing a shutter-lifter. Fig. 6 a broken detail view of the neck and feeding mechanism of the oil-tank. Fig. 7 a broken view in front elevation of one of the modified forms which my automatic cooking apparatus may assume. Fig. 8 a broken view thereof in horizontal section on the line a,b of Fig. 7, on an enlarged scale. Fig. 9 a. broken view in side elevation of the parts shown in Fig. 8.

My invention relates to an improvement in liquid fuel or oil-burning automatic cooking apparatus of the type in which the burner is bodily raised and lowered for changing its position with respect to the level of the oil or other liquid fuel, the object being to provide a simple, convenient and reliable cooking apparatus of the type described.

1n carrying out my invention, I mount a burner-base 2 carrying a burner-casing 3 upon the upper end of a vertically movable feed-tube a the lower end of which moves up and down in a gland 5.upon the upper end of a vertical oil-supply pipe 6 connected by an elbow 7 with a similar pipe 8 leading from the feed-cup 9 into which oil is fed from a removable oil-tank 10 as will be described later on. The burner which,

Specification of Letters Patent.

Patented Nov. 23, 1915.

Serial No. 870,783.

broadly speaking, is represented by the base 2 and casing 3, is raised and lowered by means of a three-armed lever comprising a lift1ng-arm 11, a journal 12 and an operating-arm 18, the arm 11 being furnished with a fork 14: the slot of which receives a pin 15 in a lug 16 offsetting from a sleeve 17 depending from the burner-base 2. The journal-arm 12 aforesaid is mounted in the upper end of a bracket 18'secured to a drippan 19 mounted between the four legs 20 at the corners of a double-walled cooking compartment or oven 21. The operatingarm 13 of the said lever is connected by a vertically arranged link 22 with a short crank-arm 23 located upon the outer end of a rock-shaf' 2 1 journaled in bearings 25, 25, applied to the back of the cooking compartment 21. At its inner end the rock-shaft 2 1 is furnished with a crank-arm 26 connected with the lower end of a long link 27 the upper end of which is connected with a crank-arm 28 upon a rock-shaft 29 journaled at its ends in a flue-pipe fitting 30 projecting from the upper rear corner of the compartment 21. The said shaft 29 carries a liftingfinger 31 engaged with the bail 32 of a damper or closure 38 located in a housing 34: set within the upper rear corner of the compartment 21 over a casing 35 therein containing an egress draft-passage 36 which is normally closed by the damper 33 which carries a small vent 37.

Directly. above the vertically movable burner comprising, as shown, the parts 2 and 3, I locate a large circular ingress draftpassage 38 (Fig. 41), in the center of the bottom of the cooking compartment 21. This passage is closedby means of a disk-shaped shutter or closure 39 swinging in the horizontal plane and furnished at its right hand end with a depending sleeve 40 by means of which it is pivotally mounted upon a stud {11 having its lower end threaded forthe re cep'tion of a retaining nut 42 and depending fro-111 a burner-seat casing 1-3 applied to the bottom of the cooking compartment 21 and entering the lower edge of the ring 44 forming the ingress draftpassage 38. For insuring the sealing of the said passage 38, I employ, as shown, two shutter-lifters in the form of spring-fingers 41-5 (Figs. 3, 4 and 5) mounted on blocks 4-6 fastened to the bottom of the compartment 21, the said spring-fingers 4C5 beingrespectively placed so thatthe shank 17 and lug 48 of the shutter 39 will ride over just as the same is moving into its closed position under the influence of a helical spring 19 attached to the bottom of the compartment 21 and to an arm offsetting from the sleeve 10 as clearly shown inFig. 3.. The said shutter 39 is swung into its open, position against the tenslon of the spring 49, by means of a link 51 interposed between the arm 52 of a bell-crank lever 53 turning on a rock-shaft 54 journaled III a bearing 55 fastened to the right hand side 7 of the cooking-compartment 21. At its upa horizontally arranged sliding latch-rod 61 furnished at'its projecting forward end with a handle 62 by meansof which the burner is lowered and the shutter 39 and the dam- .per ,33 are manually opened. The said rod 61 is'formed with a notch 63 receiving a lug 64 on a latch 65 furnished at its outer end with a forestalling-arm 66 and hung upon a pin 67 in the lower end of the case 68 of a timing-mechanism. applied by brackets 69 to the right hand side of the cooking comrartment21. The timing mechanism may be of any approved construction, and is fully illustrated in my co-pending application Serial No. 7 82,4715, filed August 1, 1913, Tim- 81 in the case 68.

ing mechanism.

As'far as shown herein, the timing-mechanism is furnished with a Setting-lever 7 0 having a handle 71 and mounted upon the projecting outer end of an arbor 72 whereby the lever is supported in front of the case 68. At its upper end, the lever is formed with a'pointer 73 sweeping over a graduated dial 74 applied to the front of the case 68. A timing-disk 75 mounted upon the arbor 72 isformed with a timing-slot 76 receiving a timing-pin 77 in a lever 78 hung upon a pin 79 and furnished at its opposite end with a handle 80 passing through a segmental slot The lever 78 is connected bya lifting-link 82 with the latch 65, the

" lower end of the link 82 being furnished with a slot 83 receiving a pin 84 upon the lever 65 which is thus permitted to be lifted by its forestalling handle 66 to forestall or anticipate the action of the timing-mechanism in case it should be desired to operate the shutter and damper, and lower the burner before the expiration of the time provided' for in setting the timing-mechanism. A'helical spring 85 con nected with the lever 78 operates to smartly lift the same when the reverse rotation of the timing-disk 75 has brought its timing-slot 75 into registration with the pin 77 in the lever 78. By setting the lever 78 with regard to the dial 7 1, the apparatus may have its burner lifted and hence extinguished and its ingress and egress passages 38 and 36 closed at any predetermined time.

Liquid fuel is supplied to the apparatus from a cup 9 (Figs. 1 and 6) receiving a neck 86 projecting from the periphery of the tank 10 and closed by a threaded cap 87 having a valve-seat 88 and provided upon its inner face with a concentric valve-chamber 89 having inlet-ports 90 and inclosing a valve 91 mounted upon a stem 92 encircled by a spring 93 located within the chamber 89 and exerting a constant effort to seat the valve 91 upon the seat 88 so that when the tank 10 is removed for refilling, the valve will automatically act to prevent the escape of any oil. The valve-stem 92, however, is adapted in length so that when the tank is in place as shown in Fig. 6, the stem 92 will engage with the bottom of the cup 9 and lift the valve 91 above its seat 88 and hold the same in that position. The normal level of oil in the cup 9 is represented by the line 9-1, to which the oil will be held by the pressure of the atmosphere. Now as the oil is drawn off from the cup, bubbles of air rising through the open valve-seat 88into the tank 10 will permit more oil to feed from the tank into the cup. I do not, however, limit myself to any particular oil-tank or feeding mechanism therefor.

As a condition precedent to the setting of the apparatus, the timing-mechanism must be set by its lever 70 after which the handle 62 is grasped and the rod 61 drawn forward until the lug 8st of the latch 83 enters the notch 63 in the rod 61, which is drawn forward against the tension of a helical spring 95 connected with it and supplying motive power for closing the shutter 39 and the damper 33 and for raising the burner so as to extinguish the same. As the handle 62 is pulled forward, the shutter 39 is swung open for opening the ingress draft-passage 38. At the same time and by the same means, the damper 33 is lifted to open the egress draft-passage 36. At the same time, also, the burner is lowered by the threearmed lever comprising the arms 11, 12 and 13. In this connection I should state that the burner and oil-cup 9 are relatively arranged so that the wick-chamber of the burner will be flooded with oil when the burner is in its lowered position and drained clear of oil when the burner is in its elevated position, so that it is only necessary to lift the burner to extinguish the light. The burner on being lowered is immediately flooded with oil and may then be lifted. The food will now be placed in the cooking compartment 21 through its double-walled door 96 which is furnished with a handle 97.

The flame from the burner and the products of combustion rise through the ingress draft-passage 38 and pass out through the egress draft-passage 36. At the termination of the period to which the timing apparatus was set, the timing-pin 77 will enter the slot 76 and the spring 85 will act to lift the link 82 which will in turn lift the lug 64: of the latch 65 out of the noth 63 when the spring 95 will act to swing the shutter 39 into its closed position and permit the damper 33 to seat itself over the egress passage 36 and also lift the burner into its elevated position in which it is drained of oil and extinguished, as explained. The cooking of the food is now continued until the apparatus has lost its heat by radiation, which will be slow on account of the insulation of the cooking compartment and its door.

In the modified construction shown by Figs. 7 to 9 inclusive, a burner-base 98 carrying a burner-casing 99, is mounted upon a vertically movable liquid fuel feed-pipe 100 passing through a gland 101 in the upper end of an oil-supply pipe 102 connected by an elbow 103 with an oil-supply pipe 104: leading from an oil-cup 105 carrying an oil-tank 106. The burner comprising the parts 98 and 99, is raised and lowered by means of a rack 107 receiving the teeth of a wheel 108 mounted upon a shaft 109 journaled in a sleeve-like bearing 110 having lugs 111 receiving a screw 112 by means of which the said bearing is clamped upon the pipe 102. As shown in Fig. 9, the bearing 110 has a lug 113 for the guidance of the lower end of the rack 107. At its rear end, the shaft 109 is furnished with a crank-arm 114, connected by a long link 115 with a crank-arm 116 at the lower end of a rock-shaft 117 furnished at its upper end with a crank-arm 118 suitably connected with a latch-rod 119 corresponding to the rod 61 aforesaid and furnished at its forward end with a handle 120. The said latch-rod 119 is controlled by a timing extinguish it when the timing-mechanism releases the train of parts between it and the said wheel 108, by a spring, not shown, but corresponding to the spring 95.

1. In an automatic cooking apparatus, the combination with a cooking compartment having an ingress draft-passage and an egress draft-passage, of a closure for the said egress draft-passage, a liquid fuel-tank, a vertically movable burner connected with the said tank and adapted to be raised and lowered with respect thereto, whereby, it is flooded with liquid fuel and drained thereof, means for automatically controlling the raising of the burner into its drained position and the closing of the said closure, and means for manually opening the said closure and controlling the lowering of theburner into its flooded position.

2. In an automatic cooking apparatus, the combination with a cooking compartment or oven having an ingress draft-passage and an egress draft-passage, closures for the said passages, a liquid fuel tank, a vertically movable burner connected with the said tank and raised and loweredwith respect to the said tank whereby it is flooded with liquid fuel and drained thereof, means for automatically controlling the closure of the said passages and the raising of the burner, and means for manually opening the said closures and controlling the lowering of the burner.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

ROSS M. e. PHILLIPS.

Witnesses:

M. P, NICHOLS, C. L. VEED.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents, Washington, I). C. 

